INVT Goodrive350-19 Series Operation Manual page 380

Goodrive350-19 Series VFD for Crane
8.6.8 Overcurrent
Decrease the torque boost
Adjust the V/F curve
Set the
V/F vibration control
parameters properly
Yes
Is the torque boost too high?
No
Yes
Is the multi-dots V/F curve set
improperly?
No
Yes
Does unusual vibration occur on
the motor?
No
There may be a VFD
fault. Contact us
Overcurrent
Is UVW on the output side of the
VFD shorted to ground?
No
Remove the motor cable to see if
there is a connection with the
ground
No
Is the motor shorted to ground?
No
Are the motor type and
parameters set properly?
Yes
Is parameter autotuning
performed?
Yes
Is the ACC/DEC time too short?
No
Is the load too heavy?
No
Are there any interference
sources?
No
Yes
Is it V/F control?
No
Are the ASR and ACR
parameters are set properly?
Yes
There may be a VFD
fault. Contact us
-368-
Troubleshooting
Yes
Rectify the short-to-
ground fault
Yes
Configure the motor
cables properly
Yes
Replace the motor
No
Set the motor type and
parameters properly
No
Perform parameter
autotuning
Yes
Adjust the ACC/DEC
time
Reduce the load and
Yes
increase the capacity of
the VFD
Yes
Remove the interference
sources
No
Set the ASR and ACR
parameters properly